Automatic train-stop.



W. W. JONES.

AUTOMATIC TRAIN STOP.

APPLICATION FILED 00'1.7, 1913.

1 1 1 6 291 Patented N 0v. 8, 19144 awuwvtom Wituaoom Elam,

WILLIAM W. JONES, 0F ENSLEY, ALABAMA.

AUTOMATIC TRAIN-STOP.

Missal.

Specification of Letters Patent.

' Patented Nov. 3, 1914.

Application filed October 7, 1918. Serial To. 703,929.

To all zr/lrmz it may concern Be it known that l lViLLuM V. (Towns, a citizen of the lhiited States, residing at Ensley. in the county of Jefferson and State of Alabama. have invented new and useful improvements in Automatic Train-Stops, of which the Following is a specification.

This invention relates to improvements in automatic train stops and has particular application to a device of this character whereby the propelling power of a car or train as the case may be will be automaticall cut off and the brakes applied injthc event of such car passing a set danger Sign cal and entering the danger zone.

In carrying out the present iniention, it is my purposeto provide an automatic train stop which will be constructed in such man her that the propelling power ot the rolling stock will be cut oil and the air brakes applied in the event of the car or train passing a set danger signal and entering the danger zone and whereby the engineer or motorman will be enabled to regain control of the propelling power and the brake system succeeding the passing of the danger signal so that such motorman or engineer ,may reverse the rolling stock and so back out of the danger zone.

It is also my purpose to provide an automatic train stop which may be installed and maintained at a minimum expense and which will opcrate elliciently and effectively for its intended purpose.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claim. i

In the accompanying drawing: Figure '1. is a fragmentary side elevation of a track way and locomotive thereon equipped with an automatic train stop constructed in accordance with my present invention. l i". 2 is a view in elevation, of a portion of the car carried mechanism, parts being shown in section.

Referring now to the accompanying drawing in detail, A indicates a trackway, while B designates a car, in the present instance, in the formof a steam locomotive designed to operate over the lines of rails of the trackway.

The numeral 1 designates atrack trip or obstacle composed of an elongated block having the opposite ends equipped with trunnions 2, i2 journaled in suitable alining bearings 3, 3 carried by the ties of the trackway upon the outer side of the lines of rails thereof. This trip or obstacle is arranged lmigitudinally of the lines of rails of the trackway and capable of swinging movement to active and inactive positions and when active lies in a vertical plane and in a horizontal plane when inactive. In the present instance; this trip is equipped with an operating arm 4- which is preferably connected through the medium of suitable link mechanism with an armature under the control of an electro magnet connected in an electric circuit under the influence of the track relay of the block signal system.

signals through the medium'of mechanical In practice, a number of trips 1 are disposed connections so that when the signals go to danger the trips will be rendered active, while when the signals are thrown to clear. the trips will be rendered inactive.

The car carried mechanism of my improved train stopping apparatus embodies a cylinder 5 in which is mounted for slidin movement a piston 6 having a piston rot 7 extending outwardly of one end of the cylinder and connected with a substantially U-shaped yoke 8 havin the opposite limbs thereof slotted longitudlnally, the slot in one limb receiving the throttle lever, while the slot in the other limb receives the handle of the ongincefs brake valve, the yoke being provided with guides 9 slidably disposed within suitable guideways 10. Fixed upon the piston rod 7 is a collar 11 spaced an appropriate distance from the stutling box in the end of the cylinder 5 through which the rod passes and, encircling the rod between such collar and stutling box a coiled expansion spring having one end abutting the stufling box and the opposite end in contact with the collar 11, such spring acting to hold the piston red at its limit of outward movement so that the engineer, under ordinary conditions, has complete control of the throttle valve and the brake valve. Leading into one end of the cylinder is a fluid supply pipe 13 and located in such pipe is a threeway valve 14 which, in one position, establishes communication between the source of fluid supply and the cylinder by way of the pipe 13 and in another position establishes communica--.

tion between the cylinder and the atmosphere. This valve lat is equipped with a handle 15 to which is connected one end of a lever 16 fulcruined between its ends as at 17 and having its opposite ends connected to the upper extremity of a vertical rod 18 mounted for sliding movement Within suitable bearings and having the lower end equipped with a roller 19 adaptedto ride upon the blocks constituting the trips.

In the present instance, 1 have shown the car carried stopping mechanism as installed in a steam locomotive and in this case the pipe 13 is connected up with the steam space of the boiler so that when the valve 14: is opened the steam will pass from the boiler through the pipe 13 and into the cylinder 5 so as to slide the piston (3 in said cylinder against the action of the spring 12 thereby drawing the piston rod 7 into the cylinder so to unlock and swing the throttle valve to closed position and operate the engineers brake valve to emergency position. On the other hand, when the valve 1% is operated to establish communication between the cylinder and the atmosphere, the steam in said cylinder is exhausted and the spring 12 re acts to move the piston and piston rod to normal position thereby enabling the en gmeer to regain control of the train.

From the foregoing description taken in connection with the accompanying drawing, the constructlon, mode of operation and manner of employing my invention will be readily apparent. Should. a signal be set at danger, it will be seen that the respective trip will be rendered active so that should a train pass the danger signal and the active trip the roller 19 on the lower end of the vertical rod 18 will ride upon the blocks constituting the trips with the effect to slide the rod 18 upwardly whereby the lever 16 will be swung about its fulcrum 17 to actuate the valve 1% and thus establish communication between the boiler and the cylinder 5, whereby the propelling power of the car will be cut oil and the brakes ap plied as previously described. After the lower end of the rod 18 leaves the active V trip, such rod gravitates to its lowered position whereby communication between the boiler and the cylinder .3 is cut off and the cylinder placed. in open communication with the atmosphere so that the steam within the cylinder will discharge into the atmosphere and the spring react to restore the parts to normal position.

I claim:

In automatic train stopping apparatus, the combination with the engineers brake valve and throttle valve lever, of a substantially U-shapcd yoke having the opposite limbs thereof slotted to receive the handle of said brake valve and said lever, means for actuating said yoke to close the throttle valve and actuate the engineers brake valve to apply the brakes, and means for guiding said yoke in its movement.

In testimony \vhereoi I atiix my signature in presence of two witnesses.

WVILLIAM W. JONES. l Vitnesses "V. F. Hnrcoon, T. A. HIJMMAon. 

